Sort and indent posts by custom field

I need to sort and indent a number of products by kind.
Each product has a value for a “Kind” custom field I previously made.
In the end, I need a Products page which would look something like this:

-Pigments (this is the kind)
-pigment1 (this is a product)
-pigment2
-pigment3

-Colourants
-coulorant1
-coulorant2

-Colorimeters
-colourimeter1
-colourimeter2
-colourimeter3
-colourimeter4

and so on…

How could I do this?
Am I going the right way (custom fields way) or should I try anything else?
Thank you so much!